qed: Assign bs->file->bs to file in bdrv_qed_co_get_block_status

Reviewed-by: NEric Blake <eblake@redhat.com>
Reviewed-by: NStefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: NFam Zheng <famz@redhat.com>
Message-id: 1453780743-16806-8-git-send-email-famz@redhat.com
Signed-off-by: NMax Reitz <mreitz@redhat.com>

block/qed.c

@@ -693,6 +693,7 @@ typedef struct {
     uint64_t pos;
     int64_t status;
     int *pnum;
+    BlockDriverState **file;
 } QEDIsAllocatedCB;
 
 static void qed_is_allocated_cb(void *opaque, int ret, uint64_t offset, size_t len)
@@ -704,6 +705,7 @@ static void qed_is_allocated_cb(void *opaque, int ret, uint64_t offset, size_t l
     case QED_CLUSTER_FOUND:
         offset |= qed_offset_into_cluster(s, cb->pos);
         cb->status = BDRV_BLOCK_DATA | BDRV_BLOCK_OFFSET_VALID | offset;
+        *cb->file = cb->bs->file->bs;
         break;
     case QED_CLUSTER_ZERO:
         cb->status = BDRV_BLOCK_ZERO;
@@ -735,6 +737,7 @@ static int64_t coroutine_fn bdrv_qed_co_get_block_status(BlockDriverState *bs,
         .pos = (uint64_t)sector_num * BDRV_SECTOR_SIZE,
         .status = BDRV_BLOCK_OFFSET_MASK,
         .pnum = pnum,
+        .file = file,
     };
     QEDRequest request = { .l2_table = NULL };